Identification by mass spectrometry and automated susceptibility testing from positive bottles: a simple, rapid, and standardized approach to reduce the turnaround time in the management of blood cultures

Table 2 Comparison of AST results for Gram-positives: agreement of the new rapid procedure with standard method

Antimicrobial agent	No. of test	Susceptibilities			EA		CA		mE		ME		VME
Antimicrobial agent	No. of test	S	I	R	No.	%	No.	%	No.	%	No.	%	No.	%
Ampicillin	20	18	0	2	20	100	20	100	0	0.0	0	0.0	0	0.0
Ampicillin-sulbactam	16	14	0	2	16	100	16	100	0	0.0	0	0.0	0	0.0
Cefotaxime	9	9	0	0	9	100	9	100	0	0.0	0	0.0	0	0.0
Ceftriaxone	9	9	0	0	8	89	9	100	0	0.0	0	0.0	0	0.0
Clindamycin	91	52	0	39	80	88	82	90	2	2.2	6	11.5	1	2.6
Daptomycin	71	70	0	1	69	97	70	99	0	0.0	1	1.4	0	0.0
Erythromycin	95	48	1	46	93	98	89	94	5	5.3	1	1.1	0	0.0
Gentamicin	71	46	0	25	70	99	70	99	0	0.0	0	0.0	1	4.0
Imipenem	21	20	0	1	21	100	21	100	0	0.0	0	0.0	0	0.0
Levofloxacin	95	54	1	40	95	100	94	99	1	1.1	0	0.0	0	0.0
Linezolid	92	92	0	0	91	99	92	100	0	0.0	0	0.0	0	0.0
Nitrofurantoin	15	15	0	0	15	100	15	100	0	0.0	0	0.0	0	0.0
Oxacillin	70	36	0	34	70	100	70	100	0	0.0	0	0.0	0	0.0
Penicillin	81	23	0	58	78	96	80	99	0	0.0	0	0.0	1	1.7
Rifampicin	76	69	0	7	74	97	75	99	0	0.0	0	0.0	1	14.3
Teicoplanin	87	71	0	16	80	92	82	94	0	0.0	2	2.3	3	18.7
Tetracycline	76	49	15	12	75	99	74	97	1	1.3	1	1.3	0	0.0
Tigecycline	87	87	0	0	87	100	87	100	0	0.0	0	0.0	0	0.0
Vancomycin	97	97	0	0	91	94	93	96	0	0.0	4	4.1	0	0.0
TOTAL	1179	879	17	283	1142	96.9	1148	97.4	9	0.8	15	1.7	7	2.5

ISSN: 1471-2334